Efficacy and Tolerability of Combination Varenicline With Hydroxyzine as a Potential Smoking Cessation Treatment

Inclusion Criteria:

1. Has signed the consent form and is able to read and understand the informationprovided in the consent form.
2. Is 19 to 65 years of age (inclusive) at screening.
3. Smokes at least 10 commercially available cigarettes per day for the last 12 months.
4. Has an expired air carbon monoxide reading of at least 10 ppm at screening.
5. Express a desire to quit smoking within the next 30 days at screening.
6. Willing and able to comply with the requirements of the study.
7. Participant owns a smart phone with text message and data capabilities.

Exclusion Criteria:

1. Is unhealthy or cannot participate in the study for any reason (e.g., medical,psychiatric, and/or social reason) as judged by the Investigator or designated medicalstaff based on all available assessments from the screening period (e.g., safetylaboratory, vital signs, physical examination, ECG, concomitant medications andmedical history).
2. PHQ-9 score greater than 9, or a score greater than 0 on item #9 ("Thoughts that youwould be better off dead, or of hurting yourself in some way") at screening.
3. High blood pressure (systolic > 150 mmHg or diastolic >95 mmHg) at screening.
4. Body mass index (BMI) less than 15.0 kg/m2 or greater than 40.0 kg/m2.
5. Coronary heart disease, structural cardiac disease, cardiac dysrhythmias, abnormal ECG (e.g. prolonged QTc), syncope, cardiac chest pain, or history of heart attack or heartfailure.
6. Has received psychotherapy or behavioral treatments potentially impacting symptoms ofdepression, anxiety, or nicotine withdrawal within 30 days of screening, or during thestudy.
7. Taking antidepressants, psychoactive medications (e.g. antipsychotics,benzodiazepines, hypnotics) or medications that prolong QTc.
8. Positive urine drug test for cocaine, marijuana, opiates, amphetamines ormethamphetamines.
9. Use of smokeless tobacco (chewing tobacco, snuff), cigars, pipes, hookah,e-cigarettes, nicotine replacement therapy or other smoking cessation treatmentswithin 14 days of enrollment.
10. Pregnant or nursing (by self-report) or has a positive pregnancy test.